public class Test1 {
    public static void main(String[] args) {
        int[] nums = {1,2,3,1};
        System.out.println(rob(nums));
    }

    public static int rob(int[] nums) {
        int n = nums.length;
        int[] dp = new int[n];
        if(n==1){
            return nums[0];
        }
        dp[0] = nums[0];
        dp[1] = Math.max(nums[0],nums[1]);
        for (int i = 2; i <nums.length; i++) {
            dp[i] = Math.max(nums[i]+dp[i-2],dp[i-1]);
        }
        return dp[n-1];
    }
}
